1. When they went to the USA. They went _____ plane.

2. I am afraid of travelling __________ ferry.

3. Have you ever been ______________ a ship?

4. It is expensive to go ________________ a taxi.

5. I usually go ________________ school bus.

6. He has a yacht. He often travels ________________ yacht.

7. They first met ________________ a train.

8. In ancient times people travelled ________________ horses.

9. Going ________________ foot is good for your health.

10. To avoid pollution we should go ________________ bicycles more.